linux-kernel - [PATCH 1/3] kbuild: Add wilddt function

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Date:   Mon, 7 Jan 2019 19:31:26 +0000
From:   Leonard Crestez <leonard.crestez@....com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Rob Herring <robh+dt@...nel.org>,
        Olof Johansson <olof@...om.net>,
        Shawn Guo <shawnguo@...nel.org>
CC:     Michal Marek <michal.lkml@...kovi.net>,
        Fabio Estevam <fabio.estevam@....com>,
        Mark Rutland <mark.rutland@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        Leo Li <leoyang.li@....com>,
        "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        dl-linux-imx <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3] kbuild: Add wilddt function

Many SOCs have very simple naming conventions for all boards using a
certain chip and long dtb lists can be collapsed using wildcards.

Since this applied to many architectures add a wilddt function to
Kbuild.include. Example usage:

dtb-$CONFIG_SOC_ABC123 += $(call wilddt,abc123-*)

Signed-off-by: Leonard Crestez <leonard.crestez@....com>
---
 scripts/Kbuild.include | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 46bf1a073f5d..6b8c0cca07c1 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -197,10 +197,16 @@ clean := -f $(srctree)/scripts/Makefile.clean obj
 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
 # Usage:
 # $(Q)$(MAKE) $(hdr-inst)=dir
 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
 
+###
+# Return list of .dtb for all .dts matching $1 in current directory
+#
+# Example usage: dtb-$CONFIG_SOC_ABC123 += $(call wilddt,abc123-*)
+wilddt = $(patsubst $(srctree)/$(src)/%.dts,%.dtb, $(wildcard $(srctree)/$(src)/$(1).dts))
+
 # Prefix -I with $(srctree) if it is not an absolute path.
 # skip if -I has no parameter
 addtree = $(if $(patsubst -I%,%,$(1)), \
 $(if $(filter-out -I/% -I./% -I../%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1)),$(1)),$(1))
 
-- 
2.17.1